Teleport Tether

The Teleport Tether is a block added by Additional Pipes. This block will keep chunks loaded while the player is absent, either in SMP where you don't have to be logged in, or in SSP where you don't have to be near the chunks you want to keep loaded. These are very useful for machinery, cooling systems, Refineries or EE systems as you don't have to worry that they'll stop.

There is a limit on the number of chunks each non-op player can load in SMP.

This block was formerly known as the ChunkLoading Block (renamed to Teleport Tether in April 15, 2012 update of AdditionalPipes).

A World Anchor has the same function, but will keep a bigger area loaded (3x3 chunks). In terms of EMC, the Teleport Tether is 18216 EMC cheaper for the same area (1 World Anchor or 9 Teleport Tethers).

A Dimensional Anchor works on a similar principle, but has an adjustable loading area of 1x1, 3x3, 5x5, 7x7 and 9x9 chunks. A Dimensional Anchor costs 10496 EMC.